Manufacture of milling cutters



Decrl4. 1926.

H. B. MCDONALD ET AL MANUFACTURE OF MILLING CUTTERS Original Filed June 27, 1921 niniiivr 3. MCDONALD nivnnfriann ililnniviineroimonintensities ivrnssncnusnr rs, ASSIG-NORS, BY'MEsiIE nssrenianivrs, o SIMONDS saw AND sirnnr. COMPA1\TY,-OF

1 I FITQHBURG, MASSACHUSETTS, A'conronnr on on nssAcH-Usnr'rs:

MANUFACTURE or. MILLINe'currEiis.

: Original application filed June 27,1921, ScrialNo. 480,580.

[20,1922. Seria1.No.58 9;35 7.

This invention relates ,to an improved method of ,manufact'uring interchangeable and adjustable.cutters' for use 1 in milling machines, this being a division of our pending application Serial No. e80,580, filed June 27,1921.

The invention involves forming ablank in the form of an elongate strip of tool 1 metal conforming in transverse sectional contour to either the transverse or the longitudinal contour of the cutter and then cutting. ofl? sections of the blank of such length as to formcutters of thedesired dimensions.

The invention isillu'strated by the accompanying drawing in which Fig. 1 1s a perspective view of a portion of cutter blank according-to the invention; and

Fig. 2 is a perspective view of three cutters cut from the blank. j

uniform in size and generally rectangular in plan.- Each cutter is of substantiallytrun cated Wedge-shape in transverse section and provided upon one side With'ribs R each rib being inclined both longitudinally and trans:

. verselyrelatively to the opposite side of the cutter for P p ses :set' for h .in' the: V BSaid application;

The cutter may be cheaply and conveniently manufactured by first forming an 'elon- 'g atefblank B, such as shown in 1, of.

any suitableor desired length, Whose transverse sectional contour is the same as the transversejseetional contour of the teeth, and

then' cutting the blank in 1 planes parallel to the'ribs R into sections of the desired W dth.-

By'einploying blanks of this character, from Which cutters ofanydesired width may be: cut, ordersfor teeth of various sizes canbe,

promptlypfilled by cutting 0E sections of the.

required Width from blank stripsca'rried in stock ,as' the sections :WhOIl cut need "no further machine operation other than the usual'sharpe'ning, to adapt them for use in the cutter heads.

From the above iit will bef'apparentthat ,the inventioii is not limited to the manuif fracture of the particular-type of cutterteeth v herein disclosed but applicable i e' he manufacture of cutterteeth andsiniilar articles which are uniform in 'tvvddiinen- S10] 1S.

We claim: f

1. The method of making inilling'cutters a which comprises; forming a strip of tool Divided and this application filed. September inetalhaving the same sectional contour as the cutter in both transverse and longitudinal planes perpendicular to the strip and having the same dimensions as the cutter alongv one of said planes, and then cutting off sections of the strip parallel to said one of the planes at'intervals equal to the other dimension of the cutters. K

2. The method of making milling cutters .Which-comprises 'forming an elongate. strip of tool metal'havingtransverseribs on one side and-L-having a'transverse. contour substantially the same as the longitudinal contour vof the cutter, and then cuttingofi' trans verse sections of the strip parallel tothe ribs at intervals substantially equal to the trans verse dimension of thecutters.

3'. The methodof making milling cutters which comprises formingan elongate blank of toolmetalhaving transverse ribs on one side, and forming cutter teeth therefrom by cuttingpfi substantially identical-transverse sections of the blank parallel to the ribs;

4.- The method of making millingcutters wh ch comprises forming an. elongate blank ofv tool metal having transverse ribs on one side, and tapering in thickness 'fromcone 1 longitudinal edge to the other, and forming cutter teeth therefrom by cutting off substantially identical transverse sections of the blank-parallel to the ribs.

5LA inillingcutter blank generally elon' I 1 gate n form and of substantially uniform or symmetrical transversecross-section cor-1 responding to'the cross-section of the'desired milling cutters, said blank being of,

suflicient length to permit ofbeing cut transv'ersely intoa plurality of cutters. I r

' 6. A milling cutter blank of substantially;

rectangular proportions, having a thickness ity of cutters. I r r r 7 A blank for use in preparing milling cutter teethjcomprisinga strip of tool metal A mit of being cuttransversely -into a"pluralof truncated Wedge shape in. transverse section, the thinner margin ofthe strip being beveled to form a cutting edge, and a plural ity of parallel ribs upon one of the inclined faces of the strip, said ribs extending substantially at right angles to the cutting edge versely to form cutter. teeth'of desired Width.

8 A milling cutter tooth blank cornpris ing a strip of tool metal of substantially :truncated Wedge shape in transverse section and of a length to produce a plurality of cutter teeth Whose transverse contour is like the contour of the blank, the thinner margin of the strip being beveled to form a cutting edge, and a plurality of ribs alternating With grooves extending transversely of the strip torinterlocking engagement with teeth 7 g and grooves oi'a cutter head, the grooves in the blank affording weakened portions facilitating the cutting of theblank into teeth of desired widths. I Y

Signed by us at Fitchburg, Massachusetts, this eighteenth day of September, 1922.

' HIRAM B. MCDONALD.

- ALFRED M. REMINGTON. 

